Mold



0. Z. MILLER} MOLD.

APPLICATION FILED lmzs. 1921.

Patented Jan. 24, 1922.

174 7274 zllllrlllifllllll UNITED STATES PATENT OFFICE.

MOLD.

Application filed January 28, 1921.

To all whom it may concern:

Be it known that I, OSE Z. MILLER, a citizen of the United States, residing at Houston, in the county of Harris and State of Texas, have invented certain new and useful Im provements in a Mold, of which the following is a specification.

This invention relates to new and useful improvements in a mold.

One object of the invention is to provide a mold which has been specially designed for the formation of the rings of packing such as is used in stuffing boxes for packing metallic rods.

Another object of the invention is to pro' vide a mold which can be easily and quickly assembled for the formation of the rings and which may also be easily opened to discharge the formed ring therefrom.

With the above and other objects in view the invention has particular relation to certain novel features of construction, arrange ment of parts and use, an example of which is given in this specification and illustrated in the accompanying drawings, wherein Figure 1 shows the mold in closed position with the cover plates removed.

Figure 2 shows the mold in open position.

Figure 3 is a perspective view of the core block.

Figure 4 shows a plan view of a cover plate employed.

Figure 5 shows a diagrammatic view illustrating the cross sectional contour of the rubber core of the packing ring, and

Figure 6 shows a cross sectional view of the complete mold, with the packing ring as formed therein.

Referring now more particularly to the drawings, wherein like numerals of reference designate similar parts in each of the figures, the numerals 1, 1 and 2 designate, respectively, the three sections into which the outer portion of the mold is formed, the section 2 being intermediate and connected to the other sections by means of hinges 3. These sections are arcuate in general contour and the sections 1, 1 have the outwardly turned grips or handles 4, 4. Pivoted to the free end of one of these handles there is the securing link 5, which is adapted to engage over the free end of the other handle, as illustrated in Figure 1, to hold the mold in closed position while the work is being done. lVhen in this position, the sections 1, 1 and 2 are in circular alignment, as shown in Fig- Specification of Letters Patent.

Patented Jan. 24, 1922.

Serial No. 440,802.

ure 1. The numeral 6 designates a circular block forming the center of the mold. T his central block is provided with three radiating wings as 7, which, when the mold is assembled, are arranged opposite, and in alignment with corresponding wings 8 which project inwardly from the respective mold sections 1 and It will be noted from an inspection of Figure 3 that the wings 7 have arcuate notches as 9 therein and the wings 8 are similarly notched. The central rubber core 10 of the packing ring to be formed, lies in these notches, when the mold is assembled, and is thus held spaced from the mold walls, as illustrated in Figure 6. The packing ring core 10, however, has the annular side ribs 11 and 12 which fit closely against the cover plates, hereinafter referred to, and said rubber core also has the outer and inner annular ribs 13, 13, which fit closely against the mold walls. These cover plates are designated by the numerals 14 and are formed of thin metal and each plate has a projecting handle 15 for convenience in fitting them into posi tion and removing them. Each cover plate has a central opening 16 and the central core block 6 has central projections 17, one on each side.

In assembling the rubber core 10 of the ring to be formed, it is fitted into the notches 9 of the wings 7 and the outer portion of the mold is then fitted around it so as to clamp it between the wings 7 and 8 and the mold, as then assembled, is secured in position by means of the link 5. The plates 14 are then placed in position, one on each side, the projections 17 fitting through the openings 16 of the plates 14 and these plate are then securely fastened in position by passing cotter-keys through the keyway 18 of each proection. Metal such as babbit is then melted and poured through the ports 19 and 20 of each of the cover plate and this metal will form around each side of the rubber core 1.0 between the partition wings. The metal poured through the ports 19 will form in arcuate segments between the ribs 13, 13 and the rib 11 around the outer side of the rubber core 10. The metal poured through the ports 20 will form into arcuate segments between the ribs 13, 13 and the rib 12 around the inner side of the rubber core 10. A diagrammatic cross sectional View of these metallic segments is indicated in Figure 5 by dotted lines. The ends of the respective segments are separated from the adjoining segments by means of the radiating wings 7 and 8 so that there will be twelve arcuate segments, six on each side. These segments are tied to the core 10 by means of tie-wires 21 which have been previously embedded into the rubber core 10 and having their ends projecting so as to become embedded in the metal when it hardens. lVhen the metal hardens the cotter-keys can be removed and the plates 14 taken from the sides of the mold. The link 5 is then released and the mold opened and the complete packing ring willdrop out. A flexible packing ring is thus termed having a rubber core encased in a metallic sheath forming a very efficient packing ring for metallic rods. lVhen these rings are assembled in the stutfing box they are arranged so that'the joints will be broken to prevent the escape of steam, thus forming a very eificient and durable stuhing boxi hat I claim is 1. A mold formed with arci'iate sections hinged together, a central core block, wings carried by said block and sections respectively, the wings of said block being in radial alignment with the wings of said sections and cover plates removably secured to each side of the mold.

ate sections, means for securing said sections in circular alignment, a core block within and spaced from the outer member, wings radiating from the coreblock and similar wings extending inwardly from said sections and arranged opposite and'in alignment with the wings of the core block, the free ends of the wings being notched to receive an annular core, and side plates detachably secured to said mold.

i. A mold' formed with arcuate sections hinged together, a central core block, wings carried by said block and sections respectively, the wings of said block being in radial alignment with the wings of said sections, said wings being notchedto receive an annular core, cover plates removably secured to each side of the mold, said plates having inlet gates through which the metal to be molded may be poured into the mold.

5. A mold-for pack'ingrings, including an outer member formed of a plurality of arouate sections hinged together, mean's'for securingsaid sections in circular alignment, :1 core block arranged within and spaced from said outer member, oppositely .disposed partition wings carried by said sections and said core block, respectively and forming separating partitions, and' side plates detach-ably secured to theside's of the mold, said plates having gate through which themetal to be molded may be poured into the mold. V v

In testimony whereof I'ha-ve signed' my name to this specification in the presencebf two subscribingwitnesses.

OSE ZyMlLLER.

itnesses: r i

W'M. A CATHEY,

Louisa 'CA'r'I-IEY. 

